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Ah, well it seems like it's on my end then. What do you guys suggest I should do with the ones that are showing some die off? I've been growing these guys for the past 15 years and never really experienced anything like this. What brand of peat are you guys using?

I was using tap water in Berkeley and noticed a buildup of mineral deposits not on Sarracenia specifically, but on the soil of other plants such as Drosera and Utricularia, so maybe there was a spike in the TDS of the water. I didn't get it tested, though.

Ah, well it seems like it's on my end then. What do you guys suggest I should do with the ones that are showing some die off? I've been growing these guys for the past 15 years and never really experienced anything like this. What brand of peat are you guys using?

If you use peat directly out of the bag without first soaking and rinsing it to remove minerals, then you may be introducing an undesirable concentration of minerals via the peat. Some brands (and even some batches) vary in the amount of mineral content, and you can be playing roulette with your plants if you don't wash the peat before using it. I strongly recommend purchasing an inexpensive ($20 or less on Amazon) TDS meter and soak the peat you use (new stuff, from the bag/bale) and then squeeze out the water after a day of soaking, and measure the TDS of that water. That should be a clear indicator whether or not the peat has significant mineral content, and determine whether or not it needs "washing" before use. I have seen some significant mineral content in certain bales I have bought, and so now I wash all peat before using it.